Differences in Henry Poole Cutters' Styles

Can anyone illuminate me as to the differences between the various (there were four at last count - Parker, Alexander, Cooke and another whose name escapes me) cutters' styles at Poole? This is of course within the broader house style of a median between drape and hard, and of classic and understated elegance.

For example, apparently Alex cuts a coat with more closed quarters, and prefers vents on a dinner jacket.